media/mojo/services/renderer_config.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_MOJO_SERVICES_RENDERER_CONFIG_H_
   6 #define MEDIA_MOJO_SERVICES_RENDERER_CONFIG_H_
   7
   8 #include "base/lazy_instance.h"
   9 #include "base/memory/scoped_vector.h"
  10 #include "base/single_thread_task_runner.h"
  11 #include "media/base/audio_decoder.h"
  12 #include "media/base/audio_hardware_config.h"
  13 #include "media/base/audio_renderer_sink.h"
  14 #include "media/base/media_log.h"
  15 #include "media/base/video_decoder.h"
  16 #include "media/base/video_renderer_sink.h"
  17
  18 namespace media {
  19
  20 // Interface class which clients will extend to override (at compile time) the
  21 // default audio or video rendering configurations for MojoRendererService.
  22 class PlatformRendererConfig {
  23  public:
  24   virtual ~PlatformRendererConfig() {};
  25
  26   // The list of audio or video decoders for use with the AudioRenderer or
  27   // VideoRenderer respectively.  Ownership of the decoders is passed to the
  28   // caller.  The methods on each decoder will only be called on
  29   // |media_task_runner|.  |media_log_cb| should be used to log errors or
  30   // important status information.
  31   virtual ScopedVector<AudioDecoder> GetAudioDecoders(
  32       const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
  33       const LogCB& media_log_cb) = 0;
  34   virtual ScopedVector<VideoDecoder> GetVideoDecoders(
  35       const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
  36       const LogCB& media_log_cb) = 0;
  37
  38   // The output sink used for rendering audio or video respectively.
  39   virtual scoped_refptr<AudioRendererSink> GetAudioRendererSink() = 0;
  40   virtual scoped_ptr<VideoRendererSink> GetVideoRendererSink() = 0;
  41
  42   // The platform's audio hardware configuration.  Note, this must remain
  43   // constant for the lifetime of the PlatformRendererConfig.
  44   virtual const AudioHardwareConfig& GetAudioHardwareConfig() = 0;
  45 };
  46
  47 class RendererConfig {
  48  public:
  49   // Returns an instance of the RenderConfig object.  Only one instance will
  50   // exist per process.
  51   static RendererConfig* Get();
  52
  53   // Copy of the PlatformRendererConfig interface.
  54   ScopedVector<AudioDecoder> GetAudioDecoders(
  55       const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
  56       const LogCB& media_log_cb);
  57   ScopedVector<VideoDecoder> GetVideoDecoders(
  58       const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
  59       const LogCB& media_log_cb);
  60   scoped_refptr<AudioRendererSink> GetAudioRendererSink();
  61   scoped_ptr<VideoRendererSink> GetVideoRendererSink();
  62   const AudioHardwareConfig& GetAudioHardwareConfig();
  63
  64  private:
  65   friend struct base::DefaultLazyInstanceTraits<RendererConfig>;
  66
  67   RendererConfig();
  68   ~RendererConfig();
  69
  70   scoped_ptr<PlatformRendererConfig> renderer_config_;
  71
  72   DISALLOW_COPY_AND_ASSIGN(RendererConfig);
  73 };
  74
  75 }  // namespace media
  76
  77 #endif  // MEDIA_MOJO_SERVICES_RENDERER_CONFIG_H_